[Rails] uninitialized constant Rake::DSL

Hey,

I've got the following problem on our jenkins server:

https://gist.github.com/460e96b3e77a7345b2b8

Locally it is running fine and I don't see any differences, rake version is 0.9.2.2 on both machines

gem list on the server returns: https://gist.github.com/8a01bd5e502d32bb6d46

Does anyone know what else this could be? How can I debug the problem?

Thanks a lot,

Christoph

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